The Dulanggou gold deposit is a typical quartz vein gold deposit, which is located at the edge of the dome in the Danba metallogenic belt, A large number of visible gold and tellurium-bismuth minerals are developed in the deposit. In this paper, tellurium-bismuth minerals and native gold in the Dulanggou gold deposit are the main objects of study, through mineralogical observation, scanning electron microscope ( SEM ) , Energy Dispersive Spectrometer ( EDS ) and electron probe analysis ( EPMA ) , the occurrence states of tellurium-bismuth minerals and native gold were studied in detail. Simultaneously, the enrichment mechanism of gold was also discussed. The results show that native gold and tellurium-bismuth minerals were mainly produced in the Ⅱ, Ⅲ stage of mineralization, native gold in Ⅱ, Ⅲ stage mineralization of Dulanggou gold deposit are mainly silver-bearing native gold, and the gold fineness is high with an average of 881, the main tellurium-bismuth minerals are tsumoite, pilsenite, hedleyite, joseiteB, unnamed tellurium-bismuth minerals(Bi2Te、Bi8Te3、Bi3Te) and native bismuth, these tellurium-bismuth minerals have a close relationship with native gold in time and space. Combined with previous studies on fluid inclusions, It is suggested that the decrease of temperature and tellurium fugacity from stage Ⅱ to stage Ⅲ of mineralization are the important reasons for the precipitation of various tellurium-bismuth minerals. The physical and chemical conditions of the Dulanggou gold deposit with the mineral characteristics of bismuth-tellurium minerals and native gold indicate that Au-Bi-Te melt is the key to the enrichment of native gold in the mineralization process.